CN1910225A - Dispersion and coating preparation containing nanoscale zinc oxide - Google Patents

Dispersion and coating preparation containing nanoscale zinc oxide Download PDF

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Publication number
CN1910225A
CN1910225A CNA2005800030627A CN200580003062A CN1910225A CN 1910225 A CN1910225 A CN 1910225A CN A2005800030627 A CNA2005800030627 A CN A2005800030627A CN 200580003062 A CN200580003062 A CN 200580003062A CN 1910225 A CN1910225 A CN 1910225A
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Prior art keywords
dispersion
zinc oxide
oxide powder
coated article
weight
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Inventor
京特·米夏埃尔
斯特凡·黑贝雷尔
吕迪格·默奇
罗伯特·迈尔
西蒙娜·杰顿
弗兰斯·德珀特尔
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Evonik Operations GmbH
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Degussa GmbH
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/04—Compounds of zinc
    • C09C1/043—Zinc oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/007—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
    • C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/67—Particle size smaller than 100 nm
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/68—Particle size between 100-1000 nm
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
    • C03C2217/44—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the composition of the continuous phase
    • C03C2217/445—Organic continuous phases
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
    • C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
    • C03C2217/47—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase consisting of a specific material
    • C03C2217/475—Inorganic materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds

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  • Chemical & Material Sciences (AREA)
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  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Colloid Chemistry (AREA)
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Abstract

The invention relates to a zinc oxide powder-containing dispersion which is characterized in that the zinc oxide powder has a BET surface area of from 10 to 200 m<2>/g, an average secondary particle size in the dispersion of less than 300 nm and a solid content of from 0.1 and 60, preferably 1 and 10 % by weight, based on the total amount of the dispersion and further characterized in that the dispersion comprises at least one additive. The invention also relates to a coating preparation which comprises the dispersion and at least one binder. The inventive coating preparation can for example be used to coat wood.

Description

The dispersion and the coated article that comprise Nano-class zinc oxide
Technical field
The present invention relates to comprise the production method of dispersion, coated article, described dispersion and coated article of Nano-class zinc oxide and the purposes of described coated article.
Background technology
Knownly protect for example timber, PVC, plastics, steel, aluminium, zinc, copper, glass, concrete substrate by using transparent coating with the paint and the form of varnish.Because Clear coating is not a UV stable, this protection is confined to internal application usually.Ultraviolet ray can penetrate coating and infringement, perhaps damages coating and the substrate under it in the worst situation.
The various trials of producing transparent antiultraviolet coating are disclosed in the prior art.But the inventor does not know anyly can guarantee the successive UV protection and be transparent system simultaneously.
Summary of the invention
Therefore, the objective of the invention is to provide transparent antiultraviolet coating to the substrate that is preferred for applications.In addition, be used for the disclosed shortcoming of prior art of applications, for example all should avoid as much as possible with the variable color of substrate bonded crackle and decomposition or substrate.
The invention provides a kind of dispersion, it comprises the BET specific surface area is 10-200m 2The oxide powder and zinc of/g, at the average second particle particle diameter of Zinc oxide powder described in the described dispersion less than 300nm, and total amount with respect to described dispersion, the solids content of described Zinc oxide powder is between 0.1-60 weight %, preferably between 1-10 weight %, and described dispersion comprises at least a additive.
According to dispersion of the present invention can be aqueous or organic, perhaps can form as the mixture of liquid phase by having water and organic solvent, only has the single liquid phase in all situations.The aqueous major portion that is interpreted as meaning liquid phase is made up of water.Organically being interpreted as meaning liquid phase mainly or only is made up of at least a organic solvent.Suitable organic solvent can be ethanol, methyl alcohol, propyl alcohol, butanols, acetone, ethyl acetate, butylacetate, alkane and/or ether.Organic solvent can also be reactive thinner, for example hexanediyl ester or tripropylene glycol diacrylate.
Aqueous dispersion is preferred according to the present invention.
Dispersion according to the present invention comprises additive.It can be to disperse auxiliary substance, emulsifying agent, pH value conditioning agent and/or stablizer.Additive is sodium polyphosphate, xitix, citric acid, 6-aminocaprolc acid, stearic acid and/or polyacrylic salt, particularly sodium salt preferably.With respect to the liquid phase of dispersion, the preferred amount of additive is 0.1-5 weight %, particularly preferably is 0.5-1.5 weight %.
Restriction to the zinc oxide type that exists in dispersion according to the present invention only is that it has 10-200m 2The BET specific surface area of/g, and in dispersion its average second particle particle diameter less than 300nm.
Preferably comprising the BET specific surface area according to dispersion of the present invention is 10-200m 2/ g and average second particle particle diameter be less than 300nm, and the zinc oxide that exists with the form of the aggregate of anisotropic primary granule.
This zinc oxide is open in DE-A-10212680.Anisotropy is interpreted as meaning atomic arrangement and changes along three spatial axes.Needle-like, nodular or tabular particle are interpreted as the example of anisotropic primary granule.The aggregate that particularly can have the mixture of nodular primary granule and needle-like primary granule, the ratio of nodular and needle-like primary granule was from 99: 1 to 1: 99.The nodular primary granule of zinc oxide preferably has the mean diameter of 10-50 nanometer and length, 10nm to the 100nm width that the needle-like primary granule preferably has 100nm to 2000nm.The aggregate of Zinc oxide powder can have be as far as possible anisotropic, by structure less than 0.5 shape-dependent constant F (circle) definition.Shape-dependent constant F (circle) has described the deviation of aggregate and circular ideal.For the ideal circular object, F (circle) equals 1.This value is low more, and structure is far away more apart from the ideal circle.Define described parameter according to ASTM 3849-89.Zinc oxide powder can be in its surface has at least 40% oxygen concentration as moisture that can not desorb with Zn-OH and/or the unitary form of Zn-OH2-.This measures by the XPS analysis (XPS=X X-ray photoelectron spectroscopy X) at the oxygen signal at 532-533eV and 534-535eV place.The volume density of Zinc oxide powder can be 40-120g/l.
In addition, for example in dispersion according to the present invention, can exist application number be 10342728.2 and the date of application be Zinc oxide powder in the German patent application on September 22nd, 2003.This is the pyrogenous origin Zinc oxide powder that the form with aggregate exists, and the BET specific surface area of this Zinc oxide powder is 10-200m 2/ g, described aggregate constitute by the different particle of pattern and the aggregate of 0-10% with round-shapedly exist, 30-50% is elliptical shape, 30-50% is linear shape, 20-30% is dendritic.
Herein, to should be understood to be those initial particles that form in the pyrolysis production process to particle according to the present invention.These particles during reaction are combined into aggregate, form the agglomerating surface.Importantly these aggregates are made of the particle of different-shape herein.According to the present invention, aggregate is by identical or practically identical particle, and primary granule is formed (DIN 53206).On the other hand, Zinc oxide powder has the aggregate that the particle by different-shape constitutes, and therefore can not be described as primary granule.Pattern is interpreted as meaning isotropic particle and anisotropic particle.These particles can be spheroidal particle for instance or be spheric particle, nodular particle, rod-shpaed particle or elongated piece as far as possible.Important part is that aggregate is bonded to one another by the agglomerating surface by different granulometric composition and these particles.The BET specific surface area of Zinc oxide powder can be 20-60m 2/ g.
Aggregate according to Zinc oxide powder of the present invention exists with circular, ellipse, line style and dendritic form.Preferably those have the particle of circle of dendritic and 2-6% of the 20-25% of the ellipse of basic identical ratio of 30-40% and line style and smaller scale to Zinc oxide powder.
Zinc oxide powder can have the compacted density of determining according to DIN ISO 787/11 that is at least 50g/l.
Zinc oxide powder can also be long-pending less than 10000nm by averaging projection's aggregate surface 2, equal circle diameter (ECD) forms less than the aggregate of 600nm less than 100nm and average perimeter.These sizes can obtain from the TEM image analysis of about 1000-2000 aggregate.Averaging projection's aggregate surface is long-pending to be 2000-8000nm 2, equal circle diameter (ECD) is particularly preferred for 25-80nm and the Zinc oxide powder of average perimeter between 200-550nm.
Replace Zinc oxide powder, can also comprise the Zinc oxide powder of hydrophobization according to dispersion of the present invention.Following compound can be used for making zinc oxide hydrophobic:
A) (RO) 3Si (C nH 2n+1) and (RO) 3Si (C nH 2n-1) the type organosilane
R=alkyl, for example methyl, ethyl, n-propyl, sec.-propyl, butyl;
n＝1-20
B) R ' x(RO) ySi (C nH 2n+1) and R ' x (RO) ySi (C nH 2n-1) the type organosilane
R=alkyl, for example methyl, ethyl, n-propyl, sec.-propyl, butyl;
R '=alkyl, for example methyl, ethyl, n-propyl, sec.-propyl, butyl, cycloalkyl;
n＝1-20；
x+y＝3；
x＝1、2；
y＝1、2；
C) X 3Si (C nH 2n+1) and X 3Si (C nH 2n-1) type halo organosilane
X＝Cl、Br；
n＝1-20
D) X 2(R ') Si (C nH 2n+1) and X 2(R ') Si (C nH 2n-1) type halo organosilane
X＝Cl、Br；
R '=alkyl, for example methyl, ethyl, n-propyl, sec.-propyl, butyl, cycloalkyl;
n＝1-20
E) X (R ') 2Si (C nH 2n+1) and X (R ') 2Si (C nH 2n-1) type halo organosilane
X＝Cl、Br；
R '=alkyl, for example methyl, ethyl, n-propyl, sec.-propyl, butyl, cycloalkyl;
n＝1-20
F) (RO) 3Si (CH 2) m-R ' type organosilane
R=alkyl, for example methyl, ethyl, n-propyl, sec.-propyl, butyl, cycloalkyl;
m＝0.1-20；
R '=methyl, aryl (for example-C 6H 5, the phenyl that replaces)
-C 4F 9、OCF 2-CHF-CF 3、-C 6F 13、-O-CF 2-CHF 2、
-NH 2、-N 3、-SCN、-CH＝CH 2、-NH-CH 2-CH 2-NH 2、
-N-(CH 2-CH 2-NH 2) 2、-OOC(CH 3)C＝CH 2、-OCH 2-CH(O)CH 2、-NH-CO-N-CO-(CH 2) 5、
-NH-COO-CH 3、-NH-COO-CH 2-CH 3、-NH-(CH 2) 3Si(OR) 3
-S x-(CH 2) 3Si(OR) 3、-SH
-NR ' R " R  (R '=alkyl, aryl; R "=H, alkyl, aryl; R =H, alkyl, aryl, benzyl, C 2H 4NR " " R " , wherein R " "=H, alkyl, R  "=H, alkyl)
G) (R ") x(RO) ySi (CH 2) m-R ' type organosilane
R "=alkyl, cycloalkyl;
X+y=2; X=1,2; Y=1,2; M=from 0.1 to 20;
R '=methyl, aryl (for example-C 6H 5, the phenyl that replaces)
-C 4F 9、-OCF 2-CHF-CF 3、-C 6F 13、-O-CF 2-CHF 2、
-NH 2、-N 3、-SCN、-CH＝CH 2、-NH-CH 2-CH 2-NH 2、
-N-(CH 2-CH 2-NH 2) 2、-OOC(CH 3)C＝CH 2、
-OCH 2-CH(O)CH 2、-NH-CO-N-CO-(CH 2) 5、
-NH-COO-CH 3、-NH-COO-CH 2-CH 3、-NH-(CH 2) 3Si(OR) 3
-S x-(CH 2) 3Si(OR) 3、-SH
-NR ' R " R  (R '=alkyl, aryl; R "=H, alkyl, aryl; R =H, alkyl, aryl, benzyl, C 2H 4NR " " R  ", wherein R " "=H, alkyl, R  "=H, alkyl)
H) X 3Si (CH 2) m-R ' type halo organosilane
X＝Cl、Br；
m＝0.1-20；
R '=methyl, aryl (for example-C 6H 5, the phenyl that replaces)
-C 4F 9、-OCF 2-CHF-CF 3、-C 6F 13、-O-CF 2-CHF 2、
-NH 2、-N 3、-SCN、-CH＝CH 2、-NH-CH 2-CH 2-NH 2、
-N-(CH 2-CH 2-NH 2) 2、-OOC(CH 3)C＝CH 2、
-OCH 2-CH(O)CH 2、-NH-CO-N-CO-(CH 2) 5、
-NH-COO-CH 3、-NH-COO-CH 2-CH 3、-NH-(CH 2) 3Si(OR) 3
-S x-(CH 2) 3Si(OR) 3、-SH
I) (R) X 2Si (CH 2) m-R ' type halo organosilane
X＝Cl、Br；
R=alkyl, for example methyl, ethyl, propyl group;
m＝0.1-20；
R '=methyl, aryl (for example-C 6H 5, the phenyl that replaces)
-C 4F 9、-OCF 2-CHF-CF 3、-C 6F 13、-O-CF 2-CHF 2、
-NH 2、-N 3、-SCN、-CH＝CH 2、-NH-CH 2-CH 2-NH 2、
-N-(CH 2-CH 2-NH 2) 2、-OOC(CH 3)C＝CH 2、
-OCH 2-CH(O)CH 2、-NH-CO-N-CO-(CH 2) 5、
-NH-COO-CH 3、-NH-COO-CH 2-CH 3、
-NH-(CH 2) 3Si (OR) 3, wherein R can be methyl, ethyl, propyl group, butyl;
-S x-(CH 2) 3Si (OR) 3, wherein R can be methyl, ethyl, propyl group, butyl;
-SH
J) (R) 2XSi (CH 2) m-R ' type halo organosilane
X＝Cl、Br；
The R=alkyl;
m＝0.1-20；
R '=methyl, aryl (for example-C 6H 5, the phenyl that replaces),
-C 4F 9、-OCF 2-CHF-CF 3、-C 6F 13、-O-CF 2-CHF 2、
-NH 2、-N 3、-SCN、-CH＝CH 2、-NH-CH 2-CH 2-NH 2、
-N-(CH 2-CH 2-NH 2) 2、-OOC(CH 3)C＝CH 2、
-OCH 2-CH(O)CH 2、-NH-CO-N-CO-(CH 2) 5、
-NH-COO-CH 3、-NH-COO-CH 2-CH 3、-NH-(CH 2) 3Si(OR) 3
-S x-(CH 2) 3Si(OR) 3、-SH
K) R ' R 2Si-NH-SiR 2R ' type silazane
R=R '=alkyl, vinyl, benzyl
L) D3, D4, D5 type cyclic polysiloxanes, wherein D3, D4 and D5 are interpreted as and have 3,4 or 5-O-Si (CH 3) 2The unitary cyclic polysiloxanes of-type.Octamethylcyclotetrasiloxane=D4 for example
Figure A20058000306200111
M) polysiloxane or the silicone oil of type below
Figure A20058000306200112
Y＝CH 3、H、C nH 2n+1，n＝1-20
Y＝Si(CH 3) 3、Si(CH 3) 2H、Si(CH 3) 2OH、Si(CH 3) 2(OCH 3)、
Si(CH 3) 2(C nH 2n+1)，n＝1-20
R=alkyl, for example C nH 2n+1, wherein n from 1 to 20
Aryl, the phenyl of phenyl and replacement for example,
(CH 2) n-NH 2、H
R '=alkyl, for example C nH 2n+1, wherein n from 1 to 20,
Aryl, the phenyl of phenyl and replacement for example,
(CH 2) n-NH 2、H
R "=alkyl, for example C nH 2n+1, wherein n from 1 to 20,
Aryl, the phenyl of phenyl and replacement for example,
(CH 2) n-NH 2、H
R =alkyl, for example C nH 2n+1, wherein n from 1 to 20,
Aryl, the phenyl of phenyl and replacement for example,
(CH 2) n-NH 2、H。
Particularly preferably can comprise the Zinc oxide powder of using octyl group Trimethoxy silane or polydimethylsiloxane hydrophobization according to dispersion of the present invention.
Hydrophobic Zinc oxide powder preferably has 10-50m 2The BET specific surface area of/g.
Described hydrophobic Zinc oxide powder preferably has 18 ± 5m 2The carbon content of the BET specific surface area of/g and 0.5-1.0 weight %.On August 22nd, 2003, the European patent application EP 03018678-7 of application provided this powder and preparation method thereof.
Can by room temperature with the material spray of surface modification to Zinc oxide powder, randomly spray with water, then obtained the Zinc oxide powder of hydrophobization at 50-400 ℃ of following thermal treatment 1-6 hour.
Can also randomly spray by vapour cure Zinc oxide powder, then obtained then at 50-800 ℃ of following thermally treated mixture 0.5-6 hour with surface modifying material with water.
Can comprise lead, the arsenic that is no more than 3ppm, the calcium that is no more than 15ppm, the iron that is no more than 200ppm that are no more than 20ppm, be no more than the antimony of 1ppm and be no more than the mercury of 1ppm according to the Zinc oxide powder in the dispersion of the present invention.
The present invention further provides production method according to dispersion of the present invention.Herein, by using Zinc oxide powder under high energy input (high energy input) dispersion condition in liquid medium.High energy input is necessary for obtaining in dispersion required fineness less than the Zinc oxide particles of 300nm.
Before disperseing, during or can add additive afterwards.Additive should be protected dispersion not reassemble and precipitate.Consumption depends on whether zinc oxide content and the dispersion in the dispersion will grow distance transportation, therefore needs antisolvent precipitation, and perhaps whether dispersion will further process after it is produced immediately.
The suitable diverting device of implementing the high energy input can be rotor-stator machinery, planetary-type mixer, Vltrasonic device or high-pressure homogenizer, for example Nanomizer  or Ultimizer  system.
The present invention further provides the coated article that comprises according to dispersion of the present invention and at least a binding agent.
Suitable binding agent can be polyacrylic ester, urethane, polyalcohols acid (polyalkyds), polyepoxide, polysiloxane, polyacrylonitrile and/or polyester.For having the dispersion of one or more reactive diluents as liquid phase, aliphatics vinylformic acid urea ester, Laromer  LR8987 for example, BASF is particularly suitable for as binding agent.
Can particularly preferably comprise polyacrylic ester and/or urethane according to coated article of the present invention.
The ratio of binding agent is preferably 0.1-50 weight % in the coated article.The scope of 1-10 weight % is particularly preferred.
The ratio of zinc oxide is preferably 0.1-60 weight % in the coated article.The scope of 1-10 weight % is particularly preferred.
Coated article can further comprise the compound of adjusting the coating composition rheological property during using.The filler that comprises silicon-dioxide is particularly advantageous, and the silicon-dioxide that pyrolysis is produced is particularly preferred.With respect to coated article integral body, its consumption is preferably 0.1-20 weight %.
Coating composition can further comprise organic solvent, the mixture of ethanol, butylacetate, ethyl acetate, acetone, butanols, THF, alkane or two or more these materials for example, with respect to coated article integral body, the consumption of organic solvent is 1 weight % to 98 weight %.
The present invention further provides production method, wherein under dispersion condition, in binding agent, add according to dispersion of the present invention according to coated article of the present invention.
The present invention further provides the purposes at the bottom of coated article according to the present invention is used to be coated with timber, PVC, plastics, steel, aluminium, zinc, copper, MDF, glass, concrete lining.
For applications, using has according to dispersion of the present invention and coating composition advantage compared with prior art:
-backing coating transparent, antiultraviolet
The possibility of-coating flavescence is very little
The nondiscoloration of-substrate
-bigger anti-zoned property
Tangible crack formation, fragility and fragment are significantly still less in-the coating.
Embodiment
Zinc oxide dispersion D-1:
Use the BET specific surface area to be 20m 2The Zinc oxide powder of/g according to DE-A-10212680 production.
Under agitation added portions in the polyacrylic water of 0.1 weight % and added Zinc oxide powder until 53.5 weight % with the form of sodium salt to 50g, and use ultrasonic finger piece (diameter: 7mm, device: ultrasonic processor UP 400s, output: 400W, Dr.Hielscher), in each case it was disperseed 1 minute.Dispersion always keeps the flowability of height.In case reach the ultimate density of 53.5 weight % zinc oxide, under water cooling, continue to disperse 2 minutes.Dispersion keeps the flowability of height, even does not also precipitate after 30 days, therefore handles easily.The pH value is approximately 10.PCS aggregated particles distribution (volume distributed median) is d 50=180nm.
Zinc oxide dispersion D-2: according to the method production identical with D-1, but fill level is 10 weight %.
Zinc oxide dispersion D-3:, but be to use the Zinc oxide powder of hydrophobization and 50: 50 water-ethanol admixture (volume ratio) to replace water according to the method production identical with D-2.According to the application number of on August 22nd, 2003 application is the Zinc oxide powder that 3018678.7 european patent application obtains described hydrophobization.It is that its BET specific surface area is 18m with the Zinc oxide powder of octyl group Trimethoxy silane hydrophobization 2/ g and carbon content are 0.6%.
Acrylic/polyurethane base coated article B-2A/PU: under dispersion condition, in commercially available acrylic/polyurethane binding agent, add zinc oxide dispersion D-2, thereby obtain comprising the coated article of 2 weight % zinc oxide dispersions.
Acrylic/polyurethane base coated article B-2A: except using commercially available acrylic acid binder goods, method is identical with the method that is used for B-2A/PU.
Acrylic/polyurethane base coated article B-3A/PU: under dispersion condition, in commercially available acrylic/polyurethane adhesive articles, add zinc oxide dispersion D-3, thereby obtain comprising the coated article of 2 weight % hydrophobization zinc oxide dispersions.
Propenyl coated article B-3A: except using commercially available acrylic acid binder goods, method is identical with the method that is used for B-3A/PU.
Coating antiultraviolet during timber: with the coated article of Embodiment B-2A/PU and B-2A be coated with three each all use priming paint (Relius Aqua Holz Grund) (QUV-B 313 for pretreated pine sample; DIN EN 927-6, ISO 11507, ASTM D 4857).Use the acrylic/polyurethane base coated article (Relius Aqua Siegel Gloss) of oxygen-free zinc to make reference.
After 1000 hour test duration, to compare with the coating of oxygen-free zinc, the coating that comprises zinc oxide of Embodiment B-2AP and B-2A has significantly less flavescence, significantly higher glossiness and coating and does not become fragile or chap.
The field trial of DIN-EN 927-1 has confirmed these results.
Hardness during coated glass: on the sheet glass of 150 μ m bed thickness, use the coated article of Embodiment B-2A/PU and B-2A, and as the acrylic/polyurethane base coated article (Relius Aqua Siegel Gloss) of the oxygen-free zinc of reference.Under normal laboratory condition (20 ℃, 65%RH), after 1,6,13 and 34 day time of drying, measure hardness (DINISO 1522).The hardness ratio reference sample that comes from the coating of Embodiment B-2A/PU and B-2A exceeds up to 100%.
Glossiness and whiteness on the tinsel of coating: with metal pretreated of white varnish.Then, according to DIN53231, handle coating composition B-2A, B-2A/PU, B-3A and B-3A/PU and commercially available coating composition and shone 55 days with the organic uv spectral filter.
During this period of time, the Berger whiteness with sample of organic uv spectral filter is 81.5, and the sample that has according to composition B-2A of the present invention and B-3A has 86.5 and 86 value respectively.
During this period of time, according to the glossiness (60 ° at glossiness angle) of composition B-2A/PU of the present invention and B-3A/PU be the reference sample 7-10 doubly.
With the ultraviolet radiation absorption and the transparency of comparing according to the dispersion that comprises Zinc oxide powder of prior art
Produce the dispersion (D4 to D7) of 0.1% weight zinc oxide in water by ultra-sonic dispersion, and write down the uv-vis spectra (bed thickness 1mm) of these dispersions.
Dispersion D4 (according to the present invention) be included in application number be 10342728.2 and the applying date be disclosed Zinc oxide powder in the German patent application on September 22nd, 2003, its BET specific surface area is 25m 2/ g.
Dispersion D5 (reference) comprises Zinc oxide powder ZnO-410, Sumitomo Osaka, and the BET specific surface area is 34m 2/ g.
Dispersion D6 (reference) comprises Zinc oxide powder Z-Cote , nanophase, the BET specific surface area is 19m 2/ g.
Dispersion D7 (reference) comprises Zinc oxide powder Zinvisible , the Zinc Corp. of the U.S., the BET specific surface area is 17m 2/ g.
Fig. 1 shows that dispersion D4 according to the present invention has high absorption and has high transparency simultaneously in the UV-A scope.D5-D7 compares with dispersion, and dispersion D4 according to the present invention has tangible advantage aspect transparency, has comparable at least UV simultaneously and absorbs.Particularly have beguine with Zinc oxide powder wherein and compare according to the dispersion D5 of the higher BET specific surface area of dispersion D4 of the present invention, this is wonderful.

Claims (18)

1. a dispersion that comprises Zinc oxide powder is characterized in that described Zinc oxide powder has 10-200m 2The BET specific surface area of/g, at the average second particle particle diameter of Zinc oxide powder described in the described dispersion less than 300nm, and total amount with respect to described dispersion, the solids content of described Zinc oxide powder is between 0.1-60 weight %, preferably between 1-10 weight %, and described dispersion comprises at least a additive.
2. according to the dispersion of claim 1, it is characterized in that described dispersion is aqueous.
3. according to the dispersion of claim 1 or 2, it is characterized in that described additive is to disperse auxiliary substance, emulsifying agent, pH value conditioning agent and/or stablizer.
4. according to the dispersion of one of claim 1-3, it is characterized in that described zinc oxide exists with the form of the aggregate of anisotropy primary granule.
5. according to the dispersion of one of claim 1-3, it is characterized in that described zinc oxide exists with the form of aggregate, wherein said aggregate is made of the particle of different-shape, and wherein said aggregate exists with following form:
The circle of-0-10%,
The ellipse of-30-50%,
-30-50%'s is linear,
-20-30%'s is dendritic.
6. according to the dispersion of claim 1-5, it is characterized in that described Zinc oxide powder is the Zinc oxide powder of hydrophobization.
7. according to the dispersion of claim 6, the Zinc oxide powder that it is characterized in that described hydrophobization is the Zinc oxide powder with octyl group Trimethoxy silane or polydimethylsiloxane hydrophobization.
8. according to the dispersion of claim 6 or 7, it is characterized in that the Zinc oxide powder of described hydrophobization has 18 ± 5m 2The carbon content of the BET specific surface area of/g and 0.5-1.0 weight %.
9. according to the dispersion of one of claim 1-8, it is characterized in that described Zinc oxide powder comprises lead, the arsenic that is no more than 3ppm, the calcium that is no more than 15ppm, the iron that is no more than 200ppm that are no more than 20ppm, is no more than the antimony of 1ppm and is no more than the mercury of 1ppm.
10. according to the production method of the dispersion of one of claim 1-9, it is characterized in that input is incorporated into described Zinc oxide powder in the liquid medium by high energy under dispersion condition, and before the dispersion treatment, during or add described additive afterwards.
11. comprise according to the dispersion of one of claim 1-9 and the coated article of at least a binding agent.
12., it is characterized in that described binding agent is selected from polyacrylic ester, urethane, polyalcohols acid, polyepoxide, polysiloxane, polyacrylonitrile and/or polyester according to the coated article of claim 11.
13. according to the coated article of claim 11 or 12, the content that it is characterized in that described binding agent is between 0.1-50 weight %.
14. according to the coated article of one of claim 11-13, the content that it is characterized in that described zinc oxide is between 0.1-60 weight %.
15., it is characterized in that it also comprises the compound of adjusting rheological characteristics according to the coated article of one of claim 11-14.
16., it is characterized in that it comprises organic solvent according to the coated article of one of claim 11-15.
17., it is characterized in that under dispersion condition, will adding in the binding agent according to the dispersion of claim 1-9 according to the production method of the coated article of one of claim 11-16.
18. the coated article according to one of claim 11-16 is used to be coated with timber, PVC, plastics, steel, aluminium, MDF, zinc, copper, glass and concrete purposes.
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